Improvement in stove-pipe dampers



G. B; CLARK. Stovepipe-Damper.

No.206,221. Patented July 23,1878.

1 Ulilllllllllllllll Gym-5L3, 05a. 7'70.

N. PETERS. FnoTo-UTMOGRAPNER, WASHINGTON, D c

UNITED STATES PATENT OEEIcE.

CHARLES B. CLARK, 0F BUFFALO, NElV YORK IMPROVEMENT IN, STOVE-PIPE DAMPERS.

Specification forming part of Letters Patent N0. 206,227, dated July 23,1878; application tiled DecembcrQO, I877.

To all whom it may concern:

Be it known that I, CrmuLEs I3. CLARK, of Bufi'alo, in the county ofErie and State of New York, have invented certain new and usefulImprovements in Stovelipe Dampers, of which the following is aspecification:

This invention relates to certain improvements in dampers forstove-pipes, its object being to facilitate the insertion of the damperin place, and to prevent the withdrawal or the heating of the handle,and also to give said handle a neat and ornamental appearance.

To this end my invention consists in constructing said damper of a diskof metal, preferably of cast metal, said disk being slot ted radiallyfrom the center to the periphery, one edge of the slot at opposite endsthereof having two lips projecting therefrom at an angle of aboutforty-five degrees, and extendin g to a plane at right angles to theradius of the damper, and from thence bent toward but not touching theopposite edge of the slot,

from which projects in opposite direction a central lip similar in formto the radial passage orspace embraced by these lips, forming a socketfor the reception of a spindle, upon which is formed one journal of thedamper, the other journal being attached to or formed directly on theperiphery of the damper diametrically opposite the radial slot.

In the drawings, Figure 1 represents a detached perspective view of thedamper and its spindle or shaft; Fig. 2, a vertical section of astove-pipe with the damper applied thereto; Fig. 3, a detached view ofthe spindle and its handle constructed according to my invention; Fig.4, a detail flatwise view of the damper; and Fig. 5, a section of damperon line w r, Fig. 4.

In the drawings, the letter A represents the damper, consisting of acircular dlsk of metal, preferably of cast metal, and provided with aradial slot, B, extending from or near the center to the periphery atone side. At the opposite ends of one edge of said slot, on one side ofthe disk, are formed the lips G 0 projecting outwardly at an angle ofabout fortyfive degrees to the face of the disk, and extending to aplane which cuts transversely through the center of the slot, and isthen bent toward but does not touch the opposite edge of the said slot,from which opposite edge projects a single central lip, 0 in an oppositedirection, but of similar form, to the lips O O. The three lips are eachone-third the length of the slot, and partially inclose a rectangular ornearly rectangular socket for the reception of the short rectangularspindle E, upon which is formed one of the journals, f, of the damper.The other journal of said damper is represented by the letter F, and isattached to or formed directly upon the periphery of the diskdiametrically opposite the radial slot B therein. The spindle E isprovided with a hollow perforated disk-shaped handle, G, through whichthe air may freely pass and keep it cool.

The disk of the damper is preferably formed with an aperture, I, at itscenter; but this may be omitted without materially changing the natureof my invention.

The inner end of the half-socket formed by the inner lip, G, is closed,except a central open slot, 0, into which projects the flattened end 0of the spindle E, and the edges of this slot thus form jaws h h, whichprevent the spindle from turning in its socket, which otherwise might insome cases occur, owing to the elasticity of the disk. I

The letter K represents the stove-pipe, which is of the ordinaryconstruction, and is provided with the usual apertures L on oppositesides, to serve as bearings for the journals.

The damper is inserted in the stove-pipe by placing the journal F in oneof the apertures L, and then inserting the end of spindle E in itssocket from the outside.

The slot in the disk allows the jaws of the socket to spring slightly,so as to clasp the spindle and embrace it tightly by its elasticity.

The handle of the spindle, being hollow and perforated, permitscirculation of the air through the same, preventing it from getting toohot for handling with convenience, while the slots impart an ornamentalappearance to the handle.

The inner lip, C ,has on its inner face a trans verse ridge, 0', which,when the spindle is in position, fits into a notch, r, therein, andprevents said spindle from being withdrawn longitudinally from itssocket except by considera-ble force.

What I claim is l. A stove-pipe damper consisting of a circular disk,slotted, as described, from the center to the periphery, the edges ofsaid slot being provided with lips on opposite sides to form a socketfor the spindle, substantially as set forth.

2. The combination, with the disk, slotted from the center to theperiphery, and provided with lips at the edge of said slot, and with apermanent journal on the periphery of the disk, as described, of theshort spindle adapted to said lips on the edges of the slot,substantially as set forth.

3. The combination of the damper-spindle having its inner endflattened,and the rigid jaws h 71, arranged near the center of. the

damper, substantially as and for the purpose set forth.

4. The combination, with the disk, slotted from the center to theperiphery, and having independent lips at the edges of said slot, one ofwhich is constructed with a ridge, r, of the short spindle, adapted tosaid lips, and having a notch, r, at its end, resting on said ridge,substantially as shown and described.

In testimony that I claim the foregoing I have hereunto set my hand inthe presence of the subscribing witnesses.

CHARLES B. CLARK.

\Vitnesses:

ALBERT H. NoRRIs, J. W. HAMILTON JOHNSON.

